Year	current US$
1970	6980000.078678133
1971	10769999.995827673
1972	5810000.061988826
1973	13469999.946653835
1974	16039999.783039091
1975	27809999.940916896
1976	17200000.140815966
1977	19359999.835491195
1978	23050000.16093255
1979	25969999.45677817
1980	35199999.541044235
1981	39150000.16242261
1982	25919999.808073036
1983	44790000.20027166
1984	42069999.82893472
1985	55899999.52912334
1986	37490000.143647194
1987	47609999.82059001
1988	35400000.2592802
1989	35600000.1318753
1990	45590000.599622734
1991	45559999.8012185
1992	63779999.73297122
1993	48209999.799728386
1994	26879999.957978718
1995	39260000.24378299
1996	14599999.770522108
1997	13660000.095143912
1998	9519999.966025345
1999	8059999.97258187
2000	7899999.875575306
2001	7509999.979287391
2002	14779999.762773521
2003	12829999.975860132
2004	17130000.32678248
2005	16829999.968409542
2006	10719999.924302105
2007	11979999.996721737
2008	11979999.989271168
2009	9280000.120401382
2010	4530000.0160932625
2011	8709999.848157162
2012	8275545.84294557
2013	5424097.023904318
2014	5153739.845845851
2015	2614770.006388427
2016	2524623.3828365807
2017	4459810.05206704
2018	3566051.8016666193
2019	9451940.022408964
2020	10701138.088479629
2021	8381129.98008728
2022	7816102.41532325